Safety scaffold pole



Sept. 14, 1948. CLARK 2,449,056

SAFETY SCAFFOLD POLE Original Filed June 15, 1942 2 Sfieets-Sheqt 1 Sept. 14, 1948. CLARK 2,449,056

SAFETY SCAFFOLD' POLE Original Filed June 15, 1942 r 2 Sheets-Sheet 2 kfii fd I 4 2 -42 J K i I 11 0.16 J 4 2- 42 9,? is M 14 4 /7 7 Patented Sept. 14, 1948 :umtreio 2,449,056 .SAFETIY soAFFoLD POLE -Howard H. Clark,- lent;0 hio Original application .June 515, 1942, Serial .No. 447,113. Divided .and thisapplicationJuly -11, 1945,'Seiial No. 604,469

18' Claims. (01. 304%337.)

My' invention relates toscaffold systems, and specifically to'certain improvements in the safety scafiold poles disclosed in my Patent N0. 2,26'h638.

"The principal object ofthe invention is to provide improved joints between superposed -pole sections in a scaffold.

-Referring to the drawings, which are made a part=ofthis application, and in which similar reference characters indicate similar parts:

Fig. 1 is an end elevationof ascafiold, illustrating'the use of certain features of novelty of my invention, ina'scaffold set up for veneering with bricks,

Fig. 2, a rear elevation of the same,

Fig.3, anelevation of'ajoint forming part of my invention,

Fig.-4,-an unassembled view of' the parts of said joint,

Fig."5,-anelevation' of a-modified form of joint,

Fig-6, a cross-section on line 'I-T-'l'l of Fig. 5,

Fig. 7,=an unassembled perspective of the parts of' Fig. 5,

Fig- 8, detail side and face-elevations of .a bottom pole member andthe next higher pole member, as'shown in Fig. '5,

Fig. 9, an elevation-of anothermodification,

Fig. 10, a section on 1ine2l-2l ofFigJ 9, Fig. 11,-a section online" 2 2-"-22 of'Figr9, 1

Fig. 12, an unassembled perspective of the parts shown in Fig- 9,

Fig. 13,- an elevation'of another modification,

Fig. 14, a section on' line'25- 25 of Fig.-l3,

Fig; 15,an unassembledperspective of the parts of the joint in*Fig.- 13,

"Fig. '16; a detail perspective of a preferred form of pole used in'my scaffold system,

In the drawings, reference character' 40-indicates generally a bottom'pole section that stands on the ground or other supporting surface and supports one or more upper" pole sections-4|, according to the same general system as in my Patent No.-2,26'7,638. Each pole section includes side bars 42, 42 (Fig.2) connected by spacers, which spacers hold said members in spaced relation so. .that aput'logs 44 resting on. said spacers may fit closely. between the sidebars so as .to be readily removed or replaced. The putlogs, as usual, 'support'planksor the like 48. The poles are braced by means of horizontal braces 49 and diagonal braces 50.

The side bars 42, 42 are secured to the spacers 43 by means of conventional. nailsil (Fig. 16) or by bolts or the like, though the spacers might obviously be integraL'the posts being merely perforated-:like those used in making rail fences of awelleknown type. r

.The workmans runway, with-its planks'59 resting ;on--.brackets 53, and :thetmaterial :platform, with planks carried by brackets 12, are

. 22 described-in -my Patent No. 2,383,449, flatw re ferredto. i

i It will -b'e-'-seen in F'ig.- s' that -thea-lower -pole member lll is squareat thebottom-andpreferably has --a long spacer extending down -to the -lower end of the member,- while: the upper end of this memberas well-as-=both ends=of the intermediate members such as-4l.- are formed as complemen tary stepped:members=adapted to fit together soas to form linear poles withzealined faces. Figs. 3-to 7 and 9 to 15show four novel-types :of in-- terfitting means for pole members-whereby the separable parts are safely'held .in -.alinement. when: superposed in a scaffold.

The jointsshown at ;.180- in-l igs. 1and 2% may be asrin -my'- patent above referred topbut they: may also beas' in-anyuof the-iorms -nowzto be described. Thuspas inF-l igs..-v 3 and 4,".lthe long side-bar 81 abuts against the :upper end .ofthe short side bar 83 and'theshort'side bar 82 abuts: at its endagainst thelong-lower.side.rbar184. A channel iron 85 is permanently attache'drtoxithe inner face of the upper endportionzof ban-84 (which portion is-reduced in thickness toreceive said iron) soas to embrace the lowenend portion. of the two-piece spacer 86--when-the jointis-assembled with the :side bars abutting .as-above: stated, the middle portion of-saidspacerwbeing: reduced in width to fitsaid iron. An external channel iron 81. fits over the abuttingends-of side bars82 and-.84,.b0th of which. arereduced. in -width ;at .theirabutting ends. Another ex ternal channeliron 88 fits. at the opposite sideof the pole over the abutting ends of bars BI and. 83, whichrare also reduced in width, and bolts w and 90 are passed through:the several parts-and: holdthem all rigidly in engagement with eaclr other.

Figs. 5 to '7 show another formof joint, where-- in the stepped relation is as in Figspaand .4, the abutting ends of side bars 90 and SI meeting .at, a level higher than. that'where the ends of the spacer sections 94. and abut, but lowerthan thepoint at-which the. ends of side bars 92 and 9;. meet. In this form .there. are no outer channel irons, but a single internal channel iron 96.15 afilxedto the bar 93 and fits over the spacer members 94 and 95, both-of whichare beveled off to fit in. the channel ;-iron (Fig. 6) the intermediate. part of the spacers being alsoreduced inthickness sufficiently to accommodate said iron. .;Screws 9'! are inserted in holes, 99in the respective sections of .the .pole to complete the joint.

.Another form of the joint is-shown in-Figs. 9-to 12 wherein the-arrangement and construction'may'be as in Figs. 5 to '7. except. that this form has added a pair of sleeves 10 0; lfll 'which are permanently secured to. therespective pole sectionsdnv such mannerthat. :the. .one. .coverszthe meeting point of bars I02 and I03 while the other covers the meeting point of bars IM' and I05, thus adding to the security of the connection, the ends of the channel iron extending into the respective sleeves. With this construction a single bolt I 07 will usually be suflicient to insure the permanency of the joint for so long as desired.

The form of joint shown in Figs. 13 to 15 may also be as in Figs. 5 to 7, except that here a single sleeve H3 is located about the joint, this sleeve being above the meeting point of bars I08 and I09, but below the meeting points of the bars H and III and of the spacer sections Hi2 and I I 2'. The sleeve has an inclined wall at the right side in Figs. 13 and 15 and the lower end of the bar I08 is reduced in thickness to enable it to enter easily into the sleeve. A single bolt II passes through the sleeve II3, the channel iron II 6,, the spacer section H2, and the respective ends of the bars I08 and III.

The parts referred to as channel bars or shapes may, of course, be of any suitable material, aluminum being preferred on account of its lightness and strength.

This application is a division of my application Ser. No. 447,113, filed June 15, 1942, now Pat. No. 2,383,449, granted August 28, 1945.

It will be obvious to those skilled in the art that many changes may be made in the system herein disclosed, all without departing from the spirit of the invention; therefore I do not limit myself to what is shown in the drawings and described in the specification, but only as indicated in the appended claims.

Having thus fully described my invention, what I claim is:

1. Scaffolding comprising superposable uprights each including a pair of spaced parallel side bars, spacers located at intervals between said side bars and secured thereto, and means for maintaining superposed uprights in alinement comprising complementary stepped ends on said uprights including a spacer at the joint between said uprights, a channel bar secured to the inner face of one of said side bars in position to embrace the spacer, and removable securing means extending transversely of the joint.

2. A scaffolding as in claim 1, said last named spacer being divided transversely between the ends of said channel bar.

3. Scaffolding as in claim 1, the division of the last named spacer being so located as toform an intermediate step between those of the side bars.

4. Scaffolding as in claim 1, including external reinforcing means for the joint.

5. Scaffolding as in claim 1, including external channel bars each extending vertically of said uprights and covering adjacent ends of a pair of alined side bars and held in place by said securing means.

6. Scaffolding as in claim 1 including a collar extending about said joint'and fixed in place.

7. Scaffolding comprising superposable apertured pole sections having elongated side members, two-part spacers interposed between the side members at thejoints between adjacent sections, each section carrying one part of a two- .part spacer, a channel bar between a two-part spacer and an adjacent side member, said channel bar covering the joint between the two parts of the spacer, and means for securing the channel bar to the spacer.

8. A scaffold pole comprising superposable pole sections having elongated side members, twopart spacers interposed between the side menibers at the points between superposed sections, each section carrying one part of the two-part spacer, a channel bar between a two=part spacer and an adjacent side member, said channel bar covering the joint between the two parts of the spacer in the assembled pole, and means for securing the channel bar to the spacer.

9. A scafiold pole comprising superposable apertured pole sections, means for maintaining a pair of superposed sections in alignment including complementary stepped ends on said pole sections, a spacer at the joint between sections and forming parts of the stepped ends, a channel bar embracing the spacer and secured to an adjacent inner face of a pole section, and means for securing the spacer and the channel bar in place.

10. Scaffolding comprising superposable apertured pole sections, means for maintaining superposed pole sections in alinement including complementary stepped ends on said pole sections, a spacer at the joint between sections and forming parts of the stepped ends, a channel bar embracing the spacer and secured to an adjacent inner face of the pole section, and means for fixing said spacer and channel bar in place.

11. Scaffolding as in claim 10, said spacer being divided transversely into sections that engage one another when the pole sections are in abutting superposed relation.

12. A device as in claim 8, wherein the spacer is divided transversely into sections that abut when the sections are in superposed position.

13. A scaffold pole comprising superposable members each including a pair of spaced parallel side bars, spacers located at intervals between said side bars and secured thereto, means for maintaining superposed uprights in alinement comprising complementary stepped ends on said uprights, said stepped ends including a spacer at the joint between said uprights, a channel bar secured to the inner face of one of said side bars in position to embrace the spacer, and removable securing means extending transversely of the joint.

14. A scaffold pole as in claim 13, wherein the spacer at said joint is divided transversely between the ends of said channel bar.

15. A scaffold pole as in claim 13, wherein the spacer at said joint is divided transversely be-, tween the ends of the channel bar so as to form an intermediate step between the steps of the side bars.

16. A scaffold pole as in claim 13, including external reinforcing means at the joint.

17. A scaffold pole as in claim 13, including external channel bars each extending parallel to the uprights and covering adjacent ends of a pair of alined side bars and held in place by said securing means.

'18. A scaffold pole as in claim 13, including a collar extending about said joint and fixed in place.

HOWARD H. CLARK.

REFERENCES CITED The following references are of record in the file of this patent: 1 v

UNITED STATES PATENTS 2,267,638 Clark Dec. 23, 1941 

